Demon Race Mechanical Ranged Unit

[Damage]

I could really use a model that fits a demon race and is a mechanical ranged unit - and preferably NOT a catapult.

For reference, I'd like something that looks very similar to that of the Demon Siege Lane Creeps in Heroes of the Storm's Diablo themed maps. It looks like a long thin platform that hovers around and fires magical projectiles from a horizontal-aligned crystal in the center. If I could find a half-decent picture, I'd show you.. but searches aren't doing well for me right now.

Thanks in advance.